ISL78235R5668 Datasheet, PDF (5/20 Pages) Intersil Corporation – Automotive 5A Synchronous Buck Regulator

ISL78235R5668
Typical Application Diagram
+3V
VIN
C₁
2x22µF
CERAMIC
POWER- GOOD
INDICATOR
R₁
100k
16
1 _VIN
2 _VDD
3 _PG
L₁
0.33µH
15
14
13
C₂
3x22µF
CERAMIC
ISL78235R5668
PGND ¹²
+1V/5A
PGND ¹¹
R₂
100k
C₃*
SGND ¹⁰
VOUT
EXTERNAL
SYNCHRONIZATION
INPUT
ENABLE INPUT
4
SYNC
FB ⁹
5
6
7
R_FS
C_SS
8
RCOMP
CCOMP
FIGURE 4. TYPICAL APPLICATION DIAGRAM
+0.6V
R₃
100k
*C3 IS OPTIONAL
IT IS RECOMMENDED TO PUT A
PLACEHOLDER FOR IT AND CHECK
LOOP ANALYSIS BEFORE USE
TABLE 2. COMPONENT SELECTION TABLE WITH INTERNAL COMPENSATION
V_OUT
1.0V
1.2V
1.5V
1.8V
2.5V
3.3V
C₁
2 x 22µF
2 x 22µF
2 x 22µF
2 x 22µF
2 x 22µF
2 x 22µF
C₂ (Note 5)
3 x 22µF
3 x 22µF
3 x 22µF
2 x 22µF
2 x 22µF
2 x 22µF
C₃
22pF
22pF
10pF
10pF
10pF
10pF
L₁
0.22µH-0.68µH 0.33µH-0.68µH 0.33µH-0.68µH
0.33µH-0.68µH 0.47µH-0.78µH
0.47µH - 0.78µH
R₂
100kΩ
100kΩ
150kΩ
200kΩ
316kΩ
450kΩ
R₃
150kΩ
100kΩ
100kΩ
100kΩ
100kΩ
100kΩ
NOTE:
5. C₂ values are minimum recommended values for ceramic capacitors. Higher capacitance may be needed based on system requirements.
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5
FN8769.1
January 21, 2016